1、July 2009DEUTSCHE NORM English price group 6No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 75.140; 91.100.50!$XTh“153
2、4969www.din.deDDIN EN 1430Bitumen and bituminous binders Determination of particle polarity of bituminous emulsionsEnglish version of DIN EN 1430:2009-07Bitumen und bitumenhaltige Bindemittel Bestimmung der Teilchenpolaritt von BitumenemulsionenEnglische Fassung DIN EN 1430:2009-07SupersedesDIN EN 1
3、430:1999-12www.beuth.deDocument comprises 9 pagesDIN EN 1430:2009-07 2 National foreword This standard has been prepared by Technical Committee CEN/TC 336 “Bituminous binders” (Secretariat: AFNOR, France). The responsible German bodies involved in its preparation were the Normenausschuss Materialprf
4、ung (Materials Testing Standards Committee) and the Normenausschuss Bauwesen (Building and Civil Engineering Standards Committee), Joint Technical Committee NA 062-03-32 GA Bitumen; Prfverfahren und Anforderungen fr die Bindemittel. Amendments This standard differs from DIN EN 1430:1999-12 as follow
5、s: a) Figures 1 and 2 have been combined in Figure 1. Previous editions DIN EN 1430: 1999-12 DIN 52044: 1980-12 EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 1430March 2009ICS 75.140; 91.100.50 Supersedes EN 1430:1999 English VersionBitumen and bituminous binders - Determination of particlepolar
6、ity of bituminous emulsionsBitumes et liants bitumineux - Dtermination de la polaritdes particules des mulsions de bitumeBitumen und bitumenhaltige Bindemittel - Bestimmung derTeilchenpolaritt von BitumenemulsionenThis European Standard was approved by CEN on 17 January 2009.CEN members are bound to
7、 comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Mana
8、gement Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as th
9、eofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia,
10、Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN na
11、tional Members.Ref. No. EN 1430:2009: EEN 1430:2009 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Principle 4 5 Reagents and materials 4 6 Apparatus .5 7 Sampling .5 8 Procedure .5 9 Expression of results 6 10 Test report 6 DIN EN 1430:2009-07 EN 1430
12、:2009 (E) 3 Foreword This document (EN 1430:2009) has been prepared by Technical Committee CEN/TC 336 “Bituminous binders”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement
13、, at the latest by September 2009, and conflicting national standards shall be withdrawn at the latest by September 2009. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identif
14、ying any or all such patent rights. This document supersedes EN 1430:1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Es
15、tonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 1430:2009-07 EN 1430:2009 (E) 4 1 Scope This European Standar
16、d specifies a method for the determination of the particle polarity of bituminous emulsions. WARNING The use of this standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibil
17、ity of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only t
18、he edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 58, Bitumen and bituminous binders - Sampling bituminous binders EN 12594, Bitumen and bituminous binders - Preparation of test samples EN ISO 3696, Water for analyt
19、ical laboratory use - Specification and test methods (ISO 3696:1987) ISO 5280, Xylene for industrial use Specification 3 Terms and definitions For the purposes of this document, the following definition applies. 3.1 particle polarity sign of the electric charge carried by particles in ionic emulsion
20、s NOTE In cationic emulsions, particles have positive polarity. In anionic emulsions, particles have negative polarity. 4 Principle A direct or rectified current is passed through a bituminous emulsion between two parallel plate electrodes. Deposition of a layer of bitumen on the anode indicates neg
21、ative polarity and that the emulsion is anionic. Deposition of particles on the cathode indicates positive polarity and that the emulsion is cationic. 5 Reagents and materials Use only reagents of recognized analytical grade and water conforming to grade 3 of EN ISO 3696. DIN EN 1430:2009-07 EN 1430
22、:2009 (E) 5 5.1 Efficient rinsing agent Efficient rinsing agents or xylene, conforming to ISO 5280, can be used. 5.2 Propan-2-ol. 5.3 Ethanol, 96 % minimum or methylated spirit 99 %. 6 Apparatus Usual laboratory apparatus and glassware, together with the following: 6.1 Electrical circuit, (see Figur
23、e 1) consisting of the following components: 6.1.1 Current source, capable of supplying a direct or rectified current of 8 mA at a potential of 4,5 V to 15 V for 30 min. 6.1.2 Milliammeter, with a full scale deflection of 10 mA. 6.1.3 Potentiometer. 6.1.4 Electrodes, two stainless steel plates appro
24、ximately 100 mm long, 25 mm wide and 1,0 mm thick, with an insulating device to hold the plates parallel and 12 mm apart in the emulsion (see Figure 1). 6.1.5 Insulator, polytetrafluoroethylene resin square rod, virgin electrical grade, (12 2) mm long, (25 2) mm wide and (15 5) mm thick. 6.2 Glass b
25、eaker, 150 ml or 250 ml capacity. 6.3 Glass rod, approximately 100 mm long and 6 mm thick or other suitable device that is capable of insulating and suspending the electrode assembly in the emulsion. 6.4 Timing device, stop watch or other suitable device. 7 Sampling The laboratory sample shall be sa
26、mpled in accordance with EN 58 and shall be prepared in accordance with EN 12594. The sample shall be divided into two portions; in case of doubt concerning the results, both portions shall be tested. 8 Procedure 8.1 Preparation of electrodes Clean the electrodes (6.1.4) in the following sequence: w
27、ash with water; wash with propan-2-ol (5.2) or ethanol or methylated spirit (5.3); DIN EN 1430:2009-07 EN 1430:2009 (E) 6 wash with rinsing agents or xylene (5.1); wash with propan-2-ol (5.2) or ethanol (5.3); wash with water. 8.2 Pour sufficient emulsion into a beaker (6.2) to permit immersion of t
28、he electrodes to a depth of approximately 25 mm in the emulsion. Suspend the electrodes, separated by the insulator (6.1.5) from the glass rod. Immerse the electrodes to the required depth in the emulsion by placing the glass rod across the top of the beaker (6.3). NOTE Any apparatus capable of manu
29、al height adjustment and of insulating and suspending the electrodes in the emulsion may be used. 8.3 Connect the electrodes to the direct current source (6.1.1), the gap between the 2 electrodes shall be equal to (12 2) mm, as shown on Figure 1. 8.4 Adjust the current to between 8 mA and 10 mA with
30、 the potentiometer (6.1.3) and start timing with the suitable timing device (6.4). Record the current used. 8.5 When the current drops to 2 mA, or at the end of 30 min, whichever occurs first, disconnect the current source, and gently wash the electrodes in running water. 8.6 Observe the deposition
31、of bituminous binder on the electrodes, and record the polarity. NOTE A cationic emulsion (with positive polarity) will deposit an appreciable layer of binder on the cathode (negative electrode). An anionic emulsion (with negative polarity) will deposit an appreciable layer of binder on the anode (p
32、ositive electrode). 9 Expression of results Express the polarity of bituminous particles in the emulsion as positive or negative (see 8.6). 10 Test report The test report shall contain at least the following information: a) type and complete identification of the sample under test; b) reference to t
33、his European Standard; c) intensity of the current used (see 8.4); d) result of the test (Clause 9); e) any deviation, by agreement or otherwise, from the procedure specified; f) date of the test. DIN EN 1430:2009-07 EN 1430:2009 (E) 7 KEY 1. Current source 2. Potentiometer 3. Milliammeter d: distance between the two electrodes d = (12 2) mm Figure 1 Example of test apparatus layout with electrical circuit DIN EN 1430:2009-07
